The main thing is to have as much removal as you can carry, and dont be too hasty trying to force a win save the kill spells for big threats or when you know it creates a lethal attack
You also need to be able to meet that person in the flesh, as well as pay the Stardust cost for the trade
Is Varina, Lich Queen legal to play

Full Decklist 4 Forest 4 Island 4 Plains Adarkar Wastes An Offer You Can't Refuse Arcane Signet Baird, Steward of Argive Bloodroot Apothecary Body of Knowledge Broken Wings Brushland Canopy Vista Chasm Skulker Coiling Oracle Command Tower Communal Brewing Coveted Jewel Cultivate Evolving Wilds Exotic Orchard Faeburrow Elder Farseek Fellwar Stone Fisher's Talent Flooded Grove Forgotten Ancient Generous Gift Ghirapur Orrery Glacial Fortress Hinterland Harbor Hoofprints of the Stag Illusionist's Gambit Intellectual Offering Jolly Gerbils Jolrael, Mwonvuli Recluse Kalonian Hydra Kwain, Itinerant Meddler Long River's Pull Loran of the Third Path Managorger Hydra Mangara, the Diplomat Martial Impetus Mind Stone Octomancer Overflowing Basin Peerless Recycling Perch Protection Perplexing Test Prairie Stream Promise of Loyalty Psychosis Crawler Razorverge Thicket Realm-Cloaked Giant Reliquary Tower Riot Control Rishkar, Peema Renegade Rites of Flourishing Seachrome Coast Seaside Citadel Secret Rendezvous Selvala, Explorer Returned Simic Ascendancy Skycloud Expanse Sol Ring Sphinx of Enlightenment Spore Frog Steelburr Champion Sungrass Prairie Sunpetal Grove Sunscorch Regent Swiftfoot Boots Swords to Plowshares Tamiyo, Field Researcher Temple of Enlightenment Temple of Mystery Temple of Plenty Tempt with Bunnies Tempt with Discovery Tenuous Truce Terramorphic Expanse Thought Vessel Thriving Grove Thriving Heath Thriving Isle Triskaidekaphile Twenty-Toed Toad Wear Down Wizard Class Yavimaya Coast Family Matters A red/blue/white deck not caring about prowess and spellslinging

You'll be paid just below market value, but you'll get the Pokmon cards off your hands at a decent price
Set to replace the existing Pokmon Trading Card Game Online app, a beta for Pokmon TCG Live can be accessed by Canadian players right now, with users being able to use various features included in the app ahead of its full release